The Bombardier Dash 8 or Q-Series, previously known as the de Havilland Canada Dash 8 or DHC-8, is a series of twin-engined, medium range, turboprop airliners. Introduced by de Havilland Canada in 1984, they are now produced by Bombardier Aerospace. Over 1,000 Dash 8s of all models have been built, with Bombardier forecasting a total production run of 1,192 aircraft of all variants through to 2016.The Dash 8 was developed from the de Havilland Canada Dash 7, which featured extreme short take-off and landing performance. With the Dash 8, DHC focused on improving cruise performance and lowering operational costs. The engine chosen was the Pratt & Whitney Canada PW100. The aircraft has been delivered in four series. The Series 100 has a maximum capacity of 39, the Series 200 has the same capacity but offers more powerful engines, the Series 300 is a stretched, 50-seat version, and the Series 400 is further stretched to 78 passengers. Models delivered after 1997 have cabin noise suppression and are designated with the prefix "Q". Production of the Series 100 ceased in 2005, and the Q200 and Q300 in 2009. Bombardier is considering launching a stretched version of the Q400. Wikipedia.
Wear | Year: 2011
This article deals with design of new wheel tread profile. An interrelationship between the equivalent conicity, contact angle and location of contact area in nominal position, the contact stress and lateral contact spreading is explained and illustrated on examples of measured worn wheel profiles. This relationship has been considered in the proposed method for profile design applied to create new profiles with target conicity and at the same time wide contact spreading. The proposed profiles are suited for vehicles running on straight tracks and/or high power traction vehicles. © 2010 Elsevier B.V.
Control Engineering Practice | Year: 2014
This contribution examines fundamental performance limitations of active stabilization of constant power loads with input LC filters. In terms of the load input admittance, stabilization is posed as a linear H∞ optimization problem, where the influence of stabilization on power control performance is minimized while meeting stability and robustness constraints. It is shown that the bandwidth of power control is upper limited by the resonance frequency of the input filter and that additional feedforward controllers can be used to individually shape reference tracking and disturbance rejection. Optimal results are verified through simulations using two different stabilization schemes. © 2014 Elsevier Ltd.
IEEE Transactions on Industrial Electronics | Year: 2015
Analytic expressions for optimal stabilization controllers for constant power loads with LC input filters are derived, directly showing the controller dependence on input filter components as well as operating conditions. The controllers are explicitly designed to stabilize the system with minimum load power modification. The minimization is done both in terms of H2 and Hinfin norms, and power reference as well as supply voltage variations is considered. The theoretical results are verified through offline as well as hardware-in-the-loop simulations. © 1982-2012 IEEE.
Bombardier | Date: 2015-02-05
A running gear for a rail vehicle includes a wheel set, a running gear frame and a shielding device, the running gear frame being supported on the wheel set. The shielding device is connected to the running gear frame via a support structure and is spatially associated to at least a shielded component of the running gear. The shielding device shields a shielded part of the shielded component against impacts of objects lifted from a track used during operation of the vehicle. The shielding device has a carrier element and at least one impact element, the at least one impact element being mounted to the carrier element for covering the carrier element and forming an impact surface for said objects. The impact element has at least one load bearing structural element made from a fiber reinforced composite material.
Bombardier | Date: 2015-12-03
A snowmobile has a frame, an endless drive track, a pair of skis, an engine operatively connected to the endless drive track, an oil tank, an electronic oil pump and an electronic control unit (ECU). The engine has at least one cylinder, a crankcase, and at least one exhaust valve. The electronic oil pump fluidly communicates with the crankcase and the at least one exhaust valve. The oil tank fluidly communicates with an inlet of the electronic oil pump for supplying oil to the electronic oil pump. The electronic oil pump delivers oil from the oil tank to the crankcase and the at least one exhaust valve. The ECU is electrically connected to the electronic oil pump for controlling actuation of the electronic oil pump.